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    copied!<p>You can use the JAXB <a href="http://download.oracle.com/javase/6/docs/api/javax/xml/bind/Binder.html" rel="noreferrer"><code>Binder</code></a> for this use case:</p> <p><strong>input.xml</strong></p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;customer&gt; &lt;UNMAPPED_ELEMENT_1/&gt; &lt;name&gt;Jane Doe&lt;/name&gt; &lt;!-- COMMENT #1 --&gt; &lt;address&gt; &lt;UNMAPPED_ELEMENT_2/&gt; &lt;street&gt;1 A Street&lt;/street&gt; &lt;!-- COMMENT #2 --&gt; &lt;UNMAPPED_ELEMENT_3/&gt; &lt;city&gt;Any Town&lt;/city&gt; &lt;/address&gt; &lt;!-- COMMENT #3 --&gt; &lt;UNMAPPED_ELEMENT_4/&gt; &lt;phone-number type="home"&gt;555-HOME&lt;/phone-number&gt; &lt;!-- COMMENT #4 --&gt; &lt;phone-number type="cell"&gt;555-CELL&lt;/phone-number&gt; &lt;UNMAPPED_ELEMENT_5/&gt; &lt;!-- COMMENT #5 --&gt; &lt;/customer&gt; </code></pre> <p><strong>Demo</strong></p> <pre><code>import java.io.File; import javax.xml.bind.*; import javax.xml.parsers.*; import javax.xml.transform.*; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.w3c.dom.*; public class BinderDemo { public static void main(String[] args) throws Exception { DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); File xml = new File("input.xml"); Document document = db.parse(xml); JAXBContext jc = JAXBContext.newInstance(Customer.class); Binder&lt;Node&gt; binder = jc.createBinder(); Customer customer = (Customer) binder.unmarshal(document); customer.getAddress().setStreet("2 NEW STREET"); PhoneNumber workPhone = new PhoneNumber(); workPhone.setType("work"); workPhone.setValue("555-WORK"); customer.getPhoneNumbers().add(workPhone); binder.updateXML(customer); TransformerFactory tf = TransformerFactory.newInstance(); Transformer t = tf.newTransformer(); t.transform(new DOMSource(document), new StreamResult(System.out)); } } </code></pre> <p><strong>Output</strong></p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8" standalone="no"?&gt; &lt;customer&gt; &lt;UNMAPPED_ELEMENT_1/&gt; &lt;name&gt;Jane Doe&lt;/name&gt; &lt;!-- COMMENT #1 --&gt; &lt;address&gt; &lt;UNMAPPED_ELEMENT_2/&gt; &lt;street&gt;2 NEW STREET&lt;/street&gt; &lt;!-- COMMENT #2 --&gt; &lt;UNMAPPED_ELEMENT_3/&gt; &lt;city&gt;Any Town&lt;/city&gt; &lt;/address&gt; &lt;!-- COMMENT #3 --&gt; &lt;UNMAPPED_ELEMENT_4/&gt; &lt;phone-number type="home"&gt;555-HOME&lt;/phone-number&gt; &lt;!-- COMMENT #4 --&gt; &lt;phone-number type="cell"&gt;555-CELL&lt;/phone-number&gt; &lt;phone-number type="work"&gt;555-WORK&lt;/phone-number&gt; &lt;UNMAPPED_ELEMENT_5/&gt; &lt;!-- COMMENT #5 --&gt; &lt;/customer&gt; </code></pre> <p><strong>For More Information</strong></p> <ul> <li><a href="http://bdoughan.blogspot.com/2010/09/jaxb-xml-infoset-preservation.html" rel="noreferrer">http://bdoughan.blogspot.com/2010/09/jaxb-xml-infoset-preservation.html</a></li> </ul>
 

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